High Brightness Ultra Wideband Fiber Source

Novel bismuth-erbium co-doped fibers (BEDFs) are prepared by the modified chemical vapor deposition process, and its fluorescence spectra covers 1380~1700nm. The structure, fiber length, pump power and Erbium ion doping concentration are discussed in this paper to explore the properties of this ultra-wideband fiber light source based on BEDF. The experiments show that the optimization of the above parameters is beneficial in improving the fluorescence intensity of this fiber light source from 1450 nm to 1700 nm. The concentration of erbium ions affects the luminescence efficiency of the fiber. It is demonstrated that the decrease of the fluorescence luminescence efficiency is due to the presence of a strong upconversion luminescence via experiments described in this paper. Finally, a high-brightness ultra-broadband light source with a full spectral width of 320 nm is obtained through a multi-parameter equalization method, and its 5db bandwidth near 1550 nm can reach 51 nm, and the output power of the light source can reach 1.95 mW.